X = int(input())

if X <= 599:
    print(8)
elif X <= 799:
    print(7)
elif X <= 999:
    print(6)
elif X <= 1199:
    print(5)
elif X <= 1399:
    print(4)
elif X <= 1599:
    print(3)
elif X <= 1799:
    print(2)
elif X <= 1999:
    print(1) X = int(input()) X int(input()) int input() input if X <= 599:
    print(8)
elif X <= 799:
    print(7)
elif X <= 999:
    print(6)
elif X <= 1199:
    print(5)
elif X <= 1399:
    print(4)
elif X <= 1599:
    print(3)
elif X <= 1799:
    print(2)
elif X <= 1999:
    print(1) X <= 599 X 599 print(8) print 8 elif X <= 799:
    print(7) X <= 799 X 799 print(7) print 7 elif X <= 999:
    print(6) X <= 999 X 999 print(6) print 6 elif X <= 1199:
    print(5) X <= 1199 X 1199 print(5) print 5 elif X <= 1399:
    print(4) X <= 1399 X 1399 print(4) print 4 elif X <= 1599:
    print(3) X <= 1599 X 1599 print(3) print 3 elif X <= 1799:
    print(2) X <= 1799 X 1799 print(2) print 2 elif X <= 1999:
    print(1) X <= 1999 X 1999 print(1) print 1 X = int(input()) int(input()) X
X = int(input())

if X <= 599:
    print(8)
elif X <= 799:
    print(7)
elif X <= 999:
    print(6)
elif X <= 1199:
    print(5)
elif X <= 1399:
    print(4)
elif X <= 1599:
    print(3)
elif X <= 1799:
    print(2)
elif X <= 1999:
    print(1)
